Cooling a 355 Hot on the freeway - Page 17 - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #241 (permalink)  
Old 10-22-2011, 04:18 AM
Registered User
 
Last photo:
Join Date: Dec 2010
Location: US
Posts: 132
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I wanted to come back and finish this thread for two reasons

1. I know it troubles me when I follow a thread that ends when no solution when I have the same problem

2. For those that wanted to lock this thread for now other reason then they had nothing to add

So here was my solution and my un-scientific reasoning

The shortest fan clutch that will mount to a early Chevy waterpump is out of Jaguar

Part numbers

Napa part # TEM261306

Hayden part #2765

AutoZone part number is 922765.

Torqflo / Fan Clutch 922765

The downside of this fan clutch is that is does not come in heavy duty meaning that is does not like a fan pitch of over 2.5 inches

So as not to overload the clutch I got a Mopar 409740 fan clutch 2.25 of pitch which was good enough to cool their 442 with AC its 19"

No fan shroud so far bit I am building one out of fiberglass

http://www.crankshaftcoalition.com/w...***_fan_shroud

Now it stays at 180 all day in 90 degree temps


Based on my testing what I have determined is that it wasnt that the Contour fan lacked in cfm it was was the fact that I have a lifted truck, and packed engine bay.

the most common thoughts is that over 30-40 mph you dont need a fan. and that is true if the air want to travel through the radiator

What the mech fan does is create some space for the air to come through at any that speed,

Your results may very

Hope I helped someone and please pm with any questions I would love to help

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #242 (permalink)  
Old 10-22-2011, 04:33 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Is the "Mopar 409740 fan clutch" a fan only, or both a fan and clutch? I think you meant to say "...good enough to cool their 440".

I never knew that "heavy duty" when referring to a fan clutch meant a certain fan blade pitch. I'm curious, where did that info come from? I'd like to read it w/the possibility of adding the info to the Crankshaft Coalition Wiki.

Thanks for the follow up and glad you got it cooled down where you want it.
Reply With Quote Quick reply to this message
  #243 (permalink)  
Old 10-22-2011, 12:21 PM
Everything is HAMMER!
 
Last photo:
Join Date: Jan 2006
Location: belleville, Michigan
Age: 25
Posts: 348
Wiki Edits: 0

Thanks: 2
Thanked 1 Time in 1 Post
I followed this thread start to end, and was relieved to see you come up with a solution and that you posted it as well. Good job, love scouts btw take good care of her.
Reply With Quote Quick reply to this message
  #244 (permalink)  
Old 10-22-2011, 01:37 PM
Registered User
 
Join Date: Aug 2006
Location: Alexandria, VA
Posts: 1,762
Wiki Edits: 0

Thanks: 4
Thanked 66 Times in 64 Posts
This link from Hayden has info about the fan pitch used with various thermal clutches.

I think that a deeper pitch on the fan puts more load and heat on the fan clutch. The HD clutch has about double the surface area to dissipate the heat, while the severe duty clutch has six times as much surface area as the standard duty clutch.

Bruce
Reply With Quote Quick reply to this message
  #245 (permalink)  
Old 10-30-2011, 08:22 PM
Registered User
 
Last photo:
Join Date: Dec 2010
Location: US
Posts: 132
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The difference between heavy duty and standard is 2 things

1) The amount of pitch the clutch can handle and dissepate through the cooling fins

2) The max % of engine speed the fan clutch will turn,
Standard duty is 50-60%
Heavy duty is 80 -90%

I have seen higher pitch fans used with this clutch (A body guys) and it works, I just dont know how much it reduces the life of the clutch
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vibration On Freeway Need Help Please chevyrestore Suspension - Brakes - Steering 24 05-01-2011 12:22 AM
car running hot on freeway prettyboyced Engine 13 03-29-2011 09:02 PM
How about Hot on the freeway? sedan_dad Engine 15 06-01-2003 08:43 PM
Freeway speed black66 Transmission - Rearend 4 05-06-2003 07:54 AM
Freeway RPM's trick66 Transmission - Rearend 5 03-09-2003 06:17 AM


All times are GMT -6. The time now is 11:22 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.